Dear craftster,It's back-to-school time and I really need a new backpack.I found one that I like, however, it's too small! It's a Lego one.I was wondering if it would be possible to replicate or recreate this backpack, just making it a little bigger?

That's what they look like - I was wondering, does anybody know how I should get started..? Is it even possible? How can I make it so that it keeps its 'rectangular' shape (and doesn't droop)?